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Post by Lake Shore Jeff M on Sept 27, 2017 12:18:06 GMT -5
0.57V Sounds like you may have a DT-670 sensor. On the DT-670 curve, 0.57V would indicate 295.5K
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Post by Lake Shore Jeff M on Sept 27, 2017 11:37:47 GMT -5
When using a current source and voltmeter to test a diode sensor, set the current to 10uA and depending on which model of diode sensor you have, the resulting room temperature voltage should be between 0.36V up to 0.56V, however, if the cryostat you have is equipped with a magnet, the sensor may be a GaAlA, gallium aluminum arsenide diode, which does produce a voltage of approximately 0.89V at room temperature.
If you would like additional assistance in this, please email service@lakeshore.com.
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Post by Lake Shore Jeff M on Sept 5, 2017 7:19:57 GMT -5
Edwin,
The message is indicating that the CAT28F020 64K Flash Memory device in location U39 has failed and most likely will need to be replaced. This is the memory location where user entered curves are stored.
Please contact Lake Shore Service at service@lakeshore.com and provide the serial number of your Model 340 so we can verify the part you will need to order.
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Post by Lake Shore Jeff M on Aug 29, 2017 6:19:32 GMT -5
Greetings Ascender,
LinkPhysics Corporation, our representative for Chine reported this issue to our service department yesterday. As I informed them, there are no settings that can be used to adjust the probe and based on the fact that the old probe and the Model 425 Gaussmeter reads the field correctly, I recommended that the Hall Probe be returned for a Warranty Failure Inspection. As long as the probe has not been damaged, we will repair and recalibrate or replace the probe and return it to you under warranty.
As defined in our warranty policy, you are responsible for the shipment to Lake Shore. As discussed above, providing no damage is found, we will repair, recalibrate and/or replace the probe at no additional cost to you.
Please continue to work with LinkPhysics to arrange the return for inspection.
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Post by Lake Shore Jeff M on Aug 17, 2017 12:59:15 GMT -5
Hello Raghu,
We have reviewed the Model 336 driver for the Keithley Model 4200- SCS and have determined that due to several reasons in the design, the driver cannot be used with the Lake Shore Model 335 Temperature Controller.
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Post by Lake Shore Jeff M on Aug 17, 2017 11:22:17 GMT -5
Hello Raghu,
We are reviewing the 4200-SCS drivers for the Model 336 to determine if it can be used with the Model 335 Controller. We will advise you of our findings as soon as possible.
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Post by Lake Shore Jeff M on Jul 12, 2017 11:41:47 GMT -5
Hello Wang,
Please make sure you have the input temperature curve set to the DT-670 curve and not the DT-470 curve. This would create the 25 degree difference you are seeing.
If the curve is set correctly, please let me know the serial number of the sensor so I can investigate the issue in more detail.
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Post by Lake Shore Jeff M on Jul 11, 2017 9:48:10 GMT -5
Please provide more information regarding your question. I need to know what Lake Shore equipment you are using? If possible, can you send a picture or screen shot of the error?
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